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https://www.readbyqxmd.com/read/27906468/optimal-timing-of-hepatitis-c-treatment-for-patients-on-the-liver-transplant-waiting-list
#1
Jagpreet Chhatwal, Sumeyye Samur, Brian Kues, Turgay Ayer, Mark S Roberts, Fasiha Kanwal, Chin Hur, Drew Michael S Donnell, Raymond T Chung
: The availability of oral direct-acting antiviral (DAAs) has altered the hepatitis C virus (HCV) treatment paradigm for both pre- and post-liver transplant (LT) patients. There is a perceived trade-off between pre- versus post-LT treatment of HCV-treatment may improve liver function but potentially decrease the likelihood of a necessary LT. Our objective was to identify LT-eligible patients with decompensated cirrhosis who would benefit (and not benefit) from pre-LT treatment based on their MELD scores...
November 5, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27905618/mechanism-of-%C3%AE-synuclein-translocation-through-a-vdac-nanopore-revealed-by-energy-landscape-modeling-of-escape-time-distributions
#2
David P Hoogerheide, Philip A Gurnev, Tatiana K Rostovtseva, Sergey M Bezrukov
We probe the energy landscape governing the passage of α-synuclein, a natural "diblock copolymer"-like polypeptide, through a nanoscale pore. α-Synuclein is an intrinsically disordered neuronal protein associated with Parkinson's pathology. The motion of this electrically heterogeneous polymer in the β-barrel voltage-dependent anion channel (VDAC) of the mitochondrial outer membrane strongly depends on the properties of both the charged and uncharged regions of the α-synuclein polymer. We model this motion in two ways...
December 1, 2016: Nanoscale
https://www.readbyqxmd.com/read/27903912/the-complex-evolutionary-history-of-aminoacyl-trna-synthetases
#3
Anargyros Chaliotis, Panayotis Vlastaridis, Dimitris Mossialos, Michael Ibba, Hubert D Becker, Constantinos Stathopoulos, Grigorios D Amoutzias
Aminoacyl-tRNA synthetases (AARSs) are a superfamily of enzymes responsible for the faithful translation of the genetic code and have lately become a prominent target for synthetic biologists. Our large-scale analysis of >2500 prokaryotic genomes reveals the complex evolutionary history of these enzymes and their paralogs, in which horizontal gene transfer played an important role. These results show that a widespread belief in the evolutionary stability of this superfamily is misconceived. Although AlaRS, GlyRS, LeuRS, IleRS, ValRS are the most stable members of the family, GluRS, LysRS and CysRS often have paralogs, whereas AsnRS, GlnRS, PylRS and SepRS are often absent from many genomes...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27903558/cost-effectiveness-analysis-of-routine-pneumococcal-vaccination-in-the-uk-a-comparison-of-the-phid-cv-vaccine-and-the-pcv-13-vaccine-using-a-markov-model
#4
Emmanuelle Delgleize, Oscar Leeuwenkamp, Eleni Theodorou, Nicolas Van de Velde
OBJECTIVES: In 2010, the 13-valent pneumococcal conjugate vaccine (PCV-13) replaced the 7-valent vaccine (introduced in 2006) for vaccination against invasive pneumococcal diseases (IPDs), pneumonia and acute otitis media (AOM) in the UK. Using recent evidence on the impact of PCVs and epidemiological changes in the UK, we performed a cost-effectiveness analysis (CEA) to compare the pneumococcal non-typeable Haemophilus influenzae protein D conjugate vaccine (PHiD-CV) with PCV-13 in the ongoing national vaccination programme...
November 30, 2016: BMJ Open
https://www.readbyqxmd.com/read/27903191/cost-effectiveness-of-stereotactic-radiosurgery-versus-whole-brain-radiation-therapy-for-up-to-10-brain-metastases
#5
Nataniel H Lester-Coll, Arie P Dosoretz, William J Magnuson, Maxwell S Laurans, Veronica L Chiang, James B Yu
OBJECTIVE The JLGK0901 study found that stereotactic radiosurgery (SRS) is a safe and effective treatment option for treating up to 10 brain metastases. The purpose of this study is to determine the cost-effectiveness of treating up to 10 brain metastases with SRS, whole-brain radiation therapy (WBRT), or SRS and immediate WBRT (SRS+WBRT). METHODS A Markov model was developed to evaluate the cost effectiveness of SRS, WBRT, and SRS+WBRT in patients with 1 or 2-10 brain metastases. Transition probabilities were derived from the JLGK0901 study and modified according to the recurrence rates observed in the Radiation Therapy Oncology Group (RTOG) 9508 and European Organization for Research and Treatment of Cancer (EORTC) 22952-26001 studies to simulate the outcomes for patients who receive WBRT...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27899706/mixed-hidden-markov-quantile-regression-models-for-longitudinal-data-with-possibly-incomplete-sequences
#6
Maria Francesca Marino, Nikos Tzavidis, Marco Alfò
Quantile regression provides a detailed and robust picture of the distribution of a response variable, conditional on a set of observed covariates. Recently, it has be been extended to the analysis of longitudinal continuous outcomes using either time-constant or time-varying random parameters. However, in real-life data, we frequently observe both temporal shocks in the overall trend and individual-specific heterogeneity in model parameters. A benchmark dataset on HIV progression gives a clear example. Here, the evolution of the CD4 log counts exhibits both sudden temporal changes in the overall trend and heterogeneity in the effect of the time since seroconversion on the response dynamics...
November 28, 2016: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/27899595/panther-version-11-expanded-annotation-data-from-gene-ontology-and-reactome-pathways-and-data-analysis-tool-enhancements
#7
Huaiyu Mi, Xiaosong Huang, Anushya Muruganujan, Haiming Tang, Caitlin Mills, Diane Kang, Paul D Thomas
The PANTHER database (Protein ANalysis THrough Evolutionary Relationships, http://pantherdb.org) contains comprehensive information on the evolution and function of protein-coding genes from 104 completely sequenced genomes. PANTHER software tools allow users to classify new protein sequences, and to analyze gene lists obtained from large-scale genomics experiments. In the past year, major improvements include a large expansion of classification information available in PANTHER, as well as significant enhancements to the analysis tools...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27899103/time-to-event-versus-ten-year-absolute-risk-in-cardiovascular-risk-prevention-does-it-make-a-difference-results-from-the-optimizing-risk-communication-optrisk-randomized-controlled-trial
#8
Charles Christian Adarkwah, Nikita Jegan, Monika Heinzel-Gutenbrunner, Felicitas Kühne, Uwe Siebert, Uwe Popert, Norbert Donner-Banzhoff, Sarah Kürwitz
BACKGROUND: The concept of shared-decision-making is a well-established approach to increase the participation of patients in medical decisions. Using lifetime risk or time-to-event (TTE) formats has been increasingly suggested as they might have advantages, e.g. in younger patients, to better show consequences of unhealthy behaviour. In this study, the most-popular ten-year risk illustration in the decision-aid-software arriba(TM) (emoticons), is compared within a randomised trial to a new-developed TTE illustration, which is based on a Markov model...
November 29, 2016: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/27898803/identification-and-expression-profiling-of-the-lectin-gene-superfamily-in-mulberry
#9
Bushra Saeed, Vinay K Baranwal, Paramjit Khurana
Lectins are a diverse group of ubiquitously present, highly specific sugar-binding proteins. Members of this large gene family have been assigned broad biological functions from defense to acting as storage proteins. Despite possessing several interesting characteristics, their functions remain essentially undefined. Mulberry ( spp.) known for its medicinal benefits is also a rich source of lectins. Using an exhaustive hidden Markov model (HMM)-based search, we identified the lectin gene complement in C.K. Schneid with around 197 members...
July 2016: Plant Genome
https://www.readbyqxmd.com/read/27898195/cost-effectiveness-of-microsurgical-reconstruction-for-head-and-neck-defects-after-oncologic-resection
#10
Lin Lin Gao, Marten Basta, Suhail K Kanchwala, Joseph M Serletti, David W Low, Liza C Wu
BACKGROUND: Microvascular free tissue transfer has become the main technique used for head and neck reconstruction. We assessed the cost-effectiveness of free flap reconstruction for head and neck defects after oncologic resection for squamous cell carcinoma (SCC). METHODS: We developed a Markov model of the cost, quality of life, survival, and incremental cost-effectiveness of reconstruction with free tissue transfer compared with locoregional flaps. Health state probabilities and quality of life scores were determined from literature...
November 29, 2016: Head & Neck
https://www.readbyqxmd.com/read/27895627/distribution-and-classification-of-serine-%C3%AE-lactamases-in-brazilian-hospital-sewage-and-other-environmental-metagenomes-deposited-in-public-databases
#11
Adriana M Fróes, Fábio F da Mota, Rafael R C Cuadrat, Alberto M R Dávila
β-lactam is the most used antibiotic class in the clinical area and it acts on blocking the bacteria cell wall synthesis, causing cell death. However, some bacteria have evolved resistance to these antibiotics mainly due the production of enzymes known as β-lactamases. Hospital sewage is an important source of dispersion of multidrug-resistant bacteria in rivers and oceans. In this work, we used next-generation DNA sequencing to explore the diversity and dissemination of serine β-lactamases in two hospital sewage from Rio de Janeiro, Brazil (South Zone, SZ and North Zone, NZ), presenting different profiles, and to compare them with public environmental data available...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27894973/is-there-nothing-new-under-the-sun-the-influence-of-herbals-and-pharmacopoeias-on-ethnobotanical-traditions-in-albacete-spain
#12
Diego Rivera, Alonso Verde, Concepción Obón, Francisco Alcaraz, Candelaria Moreno, Teresa Egea, José Fajardo, José Antonio Palazón, Arturo Valdés, Maria Adele Signorini, Piero Bruschi
ETHNOPHARMACOLOGICAL RELEVANCE: This paper has two overarching aims: (1) presenting the results of studying the Albacete tariff of medicines of 1526 and (2) broadly analyzing the origin and influences of medicinal traditional knowledge in the region of Albacete, Spain. We use historical and modern literature that may have influenced this knowledge. Our primary goal was to determine the ingredients used in the pharmacy in the 16th century CE in Albacete through the analysis of the tariff, and our secondary goal was to investigate until when ingredients and uses present in pharmacy and herbals persisted in later periods...
November 25, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27894839/relationship-of-p3b-single-trial-latencies-and-response-times-in-one-two-and-three-stimulus-oddball-tasks
#13
Matthew M Walsh, Glenn Gunzelmann, John R Anderson
The P300 is one of the most widely studied components of the human event-related potential. According to a longstanding view, the P300, and particularly its posterior subcomponent (i.e., the P3b), is driven by stimulus categorization. Whether the P3b relates to tactical processes involved in immediate responding or strategic processes that affect future behavior remains controversial, however. It is difficult to determine whether variability in P3b latencies relates to variability in response times because of limitations in the methods currently available to quantify the latency of the P3b during single trials...
November 25, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27893946/predicting-animal-home-range-structure-and-transitions-using-a-multistate-ornstein-uhlenbeck-biased-random-walk
#14
Greg A Breed, Emily A Golson, M Tim Tinker
The home-range concept is central in animal ecology and behavior, and numerous mechanistic models have been developed to understand home range formation and maintenance. These mechanistic models usually assume a single, contiguous home range. Here we describe and implement a simple home-range model that can accommodate multiple home-range centers, form complex shapes, allow discontinuities in use patterns, and infer how external and internal variables affect movement and use patterns. The model assumes individuals associate with two or more home-range centers and move among them with some estimable probability...
October 6, 2016: Ecology
https://www.readbyqxmd.com/read/27893761/high-accuracy-human-activity-recognition-based-on-sparse-locality-preserving-projections
#15
Xiangbin Zhu, Huiling Qiu
Human activity recognition(HAR) from the temporal streams of sensory data has been applied to many fields, such as healthcare services, intelligent environments and cyber security. However, the classification accuracy of most existed methods is not enough in some applications, especially for healthcare services. In order to improving accuracy, it is necessary to develop a novel method which will take full account of the intrinsic sequential characteristics for time-series sensory data. Moreover, each human activity may has correlated feature relationship at different levels...
2016: PloS One
https://www.readbyqxmd.com/read/27891146/a-self-organizing-incremental-spatiotemporal-associative-memory-networks-model-for-problems-with-hidden-state
#16
Zuo-Wei Wang
Identifying the hidden state is important for solving problems with hidden state. We prove any deterministic partially observable Markov decision processes (POMDP) can be represented by a minimal, looping hidden state transition model and propose a heuristic state transition model constructing algorithm. A new spatiotemporal associative memory network (STAMN) is proposed to realize the minimal, looping hidden state transition model. STAMN utilizes the neuroactivity decay to realize the short-term memory, connection weights between different nodes to represent long-term memory, presynaptic potentials, and synchronized activation mechanism to complete identifying and recalling simultaneously...
2016: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/27888437/estimated-budget-impact-of-adopting-the-affordable-care-act-s-required-smoking-cessation-coverage-on-united-states-healthcare-payers
#17
Christine L Baker, Cheryl P Ferrufino, Marianna Bruno, Stacey Kowal
INTRODUCTION: Despite abundant information on the negative impacts of smoking, more than 40 million adult Americans continue to smoke. The Affordable Care Act (ACA) requires tobacco cessation as a preventive service with no patient cost share for all FDA-approved cessation medications. Health plans have a vital role in supporting smoking cessation by managing medication access, but uncertainty remains on the gaps between smoking cessation requirements and what is actually occurring in practice...
November 25, 2016: Advances in Therapy
https://www.readbyqxmd.com/read/27882517/cost-effectiveness-of-apixaban-versus-warfarin-or-aspirin-for-stroke-prevention-in-patients-with-atrial-fibrillation-a-greek-perspective
#18
Kostas Athanasakis, Nadia Boubouchairopoulou, Eleftheria Karampli, Filippos Tarantilis, Paraskevi Savvari, Aikaterini Bilitou, John Kyriopoulos
BACKGROUND: Strokes attributed to atrial fibrillation (AF) represent a major cause of adult disability and a great burden to society and healthcare systems. OBJECTIVES: Our objective was to assess the cost effectiveness of apixaban, a direct acting oral anticoagulant (DOAC), versus warfarin or aspirin for patients with AF in the Greek healthcare setting. METHODS: We used a previously published Markov model to simulate clinical events for patients with AF treated with apixaban, the vitamin K antagonist (VKA) warfarin, or aspirin...
November 23, 2016: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/27882416/toward-more-efficient-surveillance-of-barrett-s-esophagus-identification-and-exclusion-of-patients-at-low-risk-of-cancer
#19
Mats Lindblad, Tim Bright, Ann Schloithe, George C Mayne, Gang Chen, Jeff Bull, Peter A Bampton, Robert J L Fraser, Piers A Gatenby, Louisa G Gordon, David I Watson
BACKGROUND: Endoscopic surveillance of Barrett's esophagus (BE) is probably not cost-effective. A sub-population with BE at increased risk of high-grade dysplasia (HGD) or esophageal adenocarcinoma (EAC) who could be targeted for cost-effective surveillance was sought. METHODS: The outcome for BE surveillance from 2003 to 2012 in a structured program was reviewed. Incidence rates and incidence rate ratios for developing HGD or EAC were calculated. Risk stratification identified individuals who could be considered for exclusion from surveillance...
November 23, 2016: World Journal of Surgery
https://www.readbyqxmd.com/read/27882067/bioinformatic-identification-of-rare-codon-clusters-rccs-in-hbv-genome-and-evaluation-of-rccs-in-proteins-structure-of-hepatitis-b-virus
#20
Mojtaba Mortazavi, Mohammad Zarenezhad, Saeid Gholamzadeh, Seyed Moayed Alavian, Mohammad Ghorbani, Reza Dehghani, Abdorrasoul Malekpour, Mohammadhasan Meshkibaf, Ali Fakhrzad
BACKGROUND: Hepatitis B virus (HBV) as an infectious disease that has nine genotypes (A - I) and a 'putative' genotype J. OBJECTIVES: The aim of this study was to identify the rare codon clusters (RCC) in the HBV genome and to evaluate these RCCs in the HBV proteins structure. METHODS: For detection of protein family accession numbers (Pfam) in HBV proteins, the UniProt database and Pfam search tool were used. Protein family accession numbers is a comprehensive and accurate collection of protein domains and families...
October 2016: Hepatitis Monthly
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